Two-stage speed changing main reducer assembly for vehicle

Abstract

The invention provides a two-stage speed changing rear axle assembly for a vehicle. The two-stage speed changing rear axle assembly for the vehicle comprises a main reducer and a rear axle, wherein the rear axle comprises a first half shaft, a second half shaft, an axle rack, axle shells, brake drums, brake discs, inserting keys, reinforcing ribs, a shock absorber bearing and an oil tube card; the axle shells are arranged on two sides of the axle rack; the inserting keys are respectively arranged at one end of the first half shaft and one end of the second half shaft; the first half shaft and the second half shaft are connected with a left half shaft and a right half shaft which are arranged on two sides of a differential mechanism; the brake discs are respectively arranged at one end of the first half shaft and one end of the second half shaft; each brake disc is provided with the corresponding brake drum; each brake drum is connected with the corresponding brake plate through bolts; and a differential case of the main reducer is connected with a high-gear driven tooth, an intermediate-gear driven tooth and a low-gear driven tooth. The rear axle assembly is compact in structure and reliable in operation, and can be used with a speed changing box of an engine; a gear shifting and torque changing range of the motor vehicle can be expanded; the optimal running speed of the motor vehicle is increased obviously; the climbing ability of the motor vehicle is improved; and the service life of the two-stage speed changing rear axle assembly for the vehicle is long.

Description

technical field [0001] The invention relates to a speed reducer for a tricycle, in particular to a speed reducer for a tricycle with a shifting function. Background technique [0002] The reducer plays the role of matching the speed and transmitting torque between the prime mover and the working machine or the actuator. The reducer is a relatively precise machine, and its purpose is to reduce the speed. The reducer is generally used for low-speed and high-torque transmission equipment. The motor, internal combustion engine or other high-speed running power is used to achieve the purpose of deceleration through the gear with a small number of teeth on the input shaft of the reducer and the large gear on the output shaft. Ordinary The reducer will also have several pairs of gears with the same principle to achieve the ideal deceleration effect. The ratio of the number of teeth of the large and small gears is the transmission ratio. [0003] In a tricycle, the reducer needs to...

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Problems solved by technology

but requires a separate transmission to shift it

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